Knob attachment.



N0 MODEL.

Inventbr.

Witnesses.

THE NORRIS 93:01: no. wuofmuwou wnsumsmn. n, c;

UNITED STATES PATENT OFFICE.

BERNARD W. NORTON, OF MERIDEN, CONNECTICUT, ASSIGNOR TO HENRY J. P.VVHIPPLE, NEW HAVEN, CONNECTICUT.

KNOB ATTACHMENT.

SPECIFICATION forming part of Letters Patent No. 720,056, dated February10, 1903.

Application filed March 24, 1900. Serial No. 10,102. (No model.)

To ctZ whom it may concern: outer end to the shoulder 70, and at a pointBe it known that I, BERNARD W. NORTON, a substantially midway betweenthe ends of citizen of the United States, residing at Merisaid reducedportion it is provided with a i den, in the county of New Haven andState of transverse slot, within which is pivotally Connecticut, haveinvented certain new and mounted a latch on. The engagement of theuseful Improvements in Knob Attachments, latch m with anyone of thenotches or grooves of which the following is a specification, ref- 71.(see Fig. 1) locks the knob 9 upon the spinerence being bad therein tothe accompanydie, and when in its locked position its outer ingdrawings. edge is substantially flush with the surface [0 My inventionrelates toimprovements in of the reduced portion of the shank 70. Toknob attachments of that class which are denormally cover said latch andretain it in ensigned to rigidly secure the knob in any adgagement withthe notchin the spindle, I have justed position upon the knob-shank, andhas provided a guard-collar n, which is adapted for its objectto-provide a novel form of such to have a free sliding movement upon the15 means which can be readily adjusted and knob-shank 76, it having twodiameters corwhich will be provided with means for coverresponding tothe two diameters of said shank, ing and protecting the lockingmechanism. with an intermediate annular shoulder o, as

, To these ends my invention consists of a shown in Figs. 4. and 5. knobattachment having certain details of A coil-spring p, embracing thereduced por- 20 construction and combination of parts, as will tion ofthe shank 7c and hearing at one end be hereinafter described, and moreparticuagainst the shoulder 7c. and at its opposite end larly pointedout in the claims. against the shouldero on the collar, normallyReferring to the drawings, in which like retains the latterin itsoperativeposition,covletters designate like parts in the severalfigering the latch m, as shown in Fig. 1. By

25 ures, Figure 1 is a sectional elevation of a sliding theguard-collaroutwardlyagainst the door-knob embodying myinvention asapplied stress of the spring 19 the latch m is exposed, to a door. Fig.2 is an elevation of the knob so that it can be raised out of engagementand a portion of its spindle with the guardwith the spindle to removethe knob g, and to collar in its retracted position and partlytemporarily retain said collar in such re- 0 broken away. Fig. 3 is anend view looking tracted position I provide the knob-shank 70 toward theleft in Fig.2, with the latch shown with the groove M, which extends fora disin its open position by broken lines. Fig. 4 tance from the freeend of said shank paralis a cross-section of the guard-collar upon linelel with the axis thereof, terminating in an 00 5c of Fig. 5, and Fig. 5is an end view of said extension-groove 75, which stands at an an- 35collar. gle to the said axis, as shown in Fig. 2, into Referring to thedrawings, the letter a deswhich groove projects a lip or stud s on theignates the door, which is provided with the guard-collar. (See Figs. 3,4, and 5.) Such usual opening I) to receive the knob-spindle;construction enables the collar to be locked c c, the two knob-roses,secured to the door in its retracted position by imparting a par- 40 byscrews, as shown, or in any other convential rotation thereto aftersliding it to its out- 0 ient manner; (1, the knob-spindle; e, the fixedermost position, causing the lip s to enter the knob, secured to saidspindle by screw f or extension-groove k and it can be as readilyotherwise, and g the adjustable knob. released by giving it a partialrotary move- The spindle d is provided with a series of ment in theopposite direction.

5 transverse notches or grooves h on opposite It is apparent that by theuse of a guard- 5 sides thereof,with the notches of one series collareitherof the specific construction herein staggered with respect tothose of the oppodescribed or of any other preferred construcsiteseries, as is common in the art. The tion within my invention thelocking means knob g has its shank It provided with a porfor securingthe knob to the spindle is cov- 50 tion of reduced diameter extendingfrom its ered and protected against accidental disen- 10o gagement,while at the same time none of the parts of the locking mechanism areexposed to be tampered with or to be lost.

Having described my invention, what I claim as new, and desire to secureby Letters Patent, is-- 1. In a knob attachment, the combination with aknob-spindle; of a knob, the shank of which is slidably mounted uponsaid spindle and provided with means whereby the said knob can berigidly secured to said spindle, and a sliding guard-collar upon saidshank movable between the knob and the knob-rose when the same is in itsoperative position and adapted to cover. and uncover the said lookingmeans, substantially as shown and described.

2. In a knob attachment, the combination with a knob-spindle, of a knobhaving its shank provided with a pivotally-secured latch adapted to havean engagement with the said spindle so as to lock the said knob thereon,and a guard-collar independent of the knobrose movable upon the saidshank and adapted, in its movement, to coverand uncover the said latch,substantially as described.

3. In a knob attachment, the combination with the knob-spindle; of aknob, the shank of which is slidable upon said spindle and having meansattached to and projecting therethrough, whereby the said knob can besecured to said spindle; and a sliding guardcollar, independent of therose, upon said knob-shank and movable thereon toward and away from thesaid knob and adapted to cover and uncover the said knob-securing means,substantially as described.

4. In a knob attachment, the combination with a knob'spindle, of a knobhaving means attached thereto for locking the said knob upon the saidspindle, and a sliding guardcollar movable upon the shank of said knoband adapted to cover and uncover the said locking means, and means forretaining the said guard-collar in its retracted position, substantiallyas described.

5. In a knob attachment, the combination with a knob-spindle, of a knobhaving its shank provided with a detent to engage said spindle to lockthe knob in'any desired position of adjustment thereon, a guard-collarloosely embracing the shank of said knob and adapted to be movedlongitudinally thereon to a position in which it covers said detent tohold the latter in engagement with the spindle, and a coil-springlocated upon said shank and engaging said collar to normally retain itin its Working position, arranged and operating substantially asdescribed.

6. In a knob attachment, thecombination with a knob-spindle, providedwith a series of transverse notches or depressions, of a knob having itsshank provided with a pivotally-secured latch movable in a plane atsubstantially a right angle to the axis of the said knob, and adapted toengage said notches to lock the knob upon the spindle, and a slidingguard-collar independent of the knobrose longitudinally movable uponsaid shank to cover and uncover said latch, substantially as described.

7. In a knob attachment, the combination with a knob-spindle, providedwith a series of transverse notches or depressions, of a knob having itsshank provided with a pivoted latch to engage said notches to lock theknob upon the spindle, a guard-collar longitudinally movable upon saidshank to cover and uncover said latch, a spring engaging said collar tonormally retain it in a position in which it covers said latch, andmeans for locking said collar in a retracted position in which ituncovers said latch, substantially as described.

8. In a knob attachment, the combination with a knob-spindle, of a knobhaving its shank provided with a detent to engage said spindle to lockthe knob upon the latter and having in the outer surface of said shank agroove which extends for a distance from its free end in a planeparallel with the axis of said shank and terminates in an extensionwhich is angular to said axis, and a guardcollar loosely mounted uponsaid shank and having an internal lip or stud which enters the groove inthe latter, substantially as and for the purpose described.

9. The combination with the knob-spindle 61 provided with the series ofnotches h, of the knob g having its shank kprovided with the pivotedlatch on and groove 10 guardcollar 92 having the internal lip s enteringsaid groove in said shank, and spring 19, arranged and operatingsubstantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

BERNARD W. NORTON.

Witnesses:

WILLIAM O. STowELL, Jr., HENRY DRYHURST.

